Misconception

You should go for the subjects in which you have strong base. Then this question of High & Low does not arise.

Yes sometimes Paper is too elementary and seems easy & would give high score if you have attempted it well.

Sometimes paper is set too much high level and difficult to attempt, which is called " Subject being Hit by FPSC" and hence gives low score.

There is no paper like easy currency of marks in CSS. Luck also plays alot.

Many serving CSPs attempted Indo-Pak, Urdu like subjects and now doing their jobs.

FPSC has started surprising candidates by unexpected papers now and has destroyed the concepts of High and Low...........many subjects thought to be of high scoring have been changed pattern wise ..........so on to curb cramming and formula preparation of Academies.